JP2019212612A - Electrical circuit breaker - Google Patents

Abstract

To provide an electrical circuit breaker capable of effectively extinguishing an arc occurring immediately after interrupting an electrical circuit.SOLUTION: An electrical circuit breaker 600 includes: a cut part 400 which is arranged inside a housing 300 and which configures part of an electrical circuit; a cutting member 511 which cuts the cut part 400; and a power source P which is arranged on a first terminal side of the housing 300. The electrical circuit breaker includes a moving body 500 where the cut part 400 is inserted into and housed and which includes the cutting member and a first arc extinguishing space adjacent to the cutting member 511. The moving body 500 is configured such that, while moving from a first terminal towards a second terminal by the power source P, the cutting member 511 provided on the moving body 500 cuts the cut part 400, and the first arc extinguishing space of the moving body 500 is configured to be positioned between a separation piece 420 of the cut part, which is cut and removed when the moving body moves, and a body 430 of the cut part, which is not removed but remains in the housing.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electric circuit breaker that can be used mainly in an electric circuit of an automobile or the like.

  Conventionally, an electric circuit breaker has been used to protect an electric circuit mounted in an automobile or the like and various electric components connected to the electric circuit. Specifically, when an abnormality occurs in the electric circuit, the electric circuit breaker cuts a part of the electric circuit to physically cut off the electric circuit.

  There are various types of this electric circuit breaker. For example, in the electric circuit breaker 700 of Patent Document 1 shown in FIG. 23, the derivative 710 constituting a part of the electric circuit is replaced with a cutting chamber in the housing 720. 721 is inserted and accommodated, and is physically cut by a punch 730. The punch 730 is punched so as to cross the derivative 710 in the cylindrical cutting chamber 721, and the punched conductor 710 is in a separated state. However, immediately after the dielectric 710 is punched, there is a problem in that an arc is generated between the conductor 710 that is punched and separated and the conductor 710 remaining in the housing. .

International Publication Number W02015 / 117998

  In view of the above problems, the present invention provides an electric circuit interrupting device that can effectively extinguish an arc generated immediately after the electric circuit is interrupted.

  An electrical circuit breaker according to the present invention includes a housing, a cut portion that is disposed in the housing and forms a part of the electric circuit, a cutting member that cuts the cut portion, and a first end portion of the housing A power source disposed on a side of the electric circuit breaker, wherein the cut portion and the cutting member and a first arc extinguishing adjacent to the cutting member And a cylindrical portion capable of moving the movable body between the first end and a second end opposite to the first end. The moving body is moved from the first end portion toward the second end portion by the power source, and the cutting member provided in the moving body cuts the cut portion. The first arc-extinguishing space of the movable body is configured as described above. When the moving body moves, it is configured to be positioned between a separation piece of the cut portion that is cut and separated and a main body portion of the cut portion that remains in the housing without being separated. It is characterized by being.

  According to the above feature, the moving body itself includes a cutting member that cuts the part to be cut and a first arc extinguishing space, and the first arc extinguishing space includes an electric circuit in which the cutting member cuts the separation piece. Immediately after blocking, the separation piece that is cut and separated and the main body portion that remains in the housing without being separated are configured. Therefore, immediately after the electric circuit is cut off, the arc generated from the main body can be discharged into the first arc extinguishing space and extinguished.

  An electric circuit breaker according to the present invention includes a housing, a part to be cut in the electric circuit that is disposed in the housing and made of a fuse, and a power source that is disposed on the first end side of the housing. An electric circuit breaker comprising: a moving body having a first arc extinguishing space filled with an arc extinguishing material therein, the housing being inserted and housed therein; Comprises a cylinder part that can move the moving body between the first end and a second end opposite to the first end, the moving body being driven by the power source The movable body is configured to cut the cut portion accommodated in the first arc extinguishing space of the movable body while moving from the first end portion toward the second end portion. The first arc extinguishing space is cut when the moving body moves. Said to be cut of the separation pieces are separated between the main body portion of the object cutting portion remaining in the housing without being separated, characterized in that it is configured to be positioned.

  According to the above feature, the moving body itself includes the first arc extinguishing space that accommodates and cuts the cut portion, and the first arc extinguishing space is immediately after cutting the separation piece and cutting off the electric circuit. The separation piece is cut and separated, and the main body is left in the housing without being separated. Therefore, immediately after interruption of the electric circuit, the arc generated from the main body is discharged into the first arc extinguishing space and can be effectively extinguished by the arc extinguishing material in the first arc extinguishing space.

  In the electric circuit breaker according to the present invention, the moving body includes an insulating space that is insulated from each other, and when the moving body further moves toward the second end, the insulating space includes the covered space. It is comprised so that it may face the main-body part of a cutting part.

  According to the above feature, after the moving body further moves, the insulating space is configured to face the main body portion of the cut portion remaining in the housing, so that a high voltage is applied to the main body portions on both sides, and the main body portion Even if an arc is generated, the arcs are confined in the insulating space and insulated from each other, so that it is possible to prevent the arc from being connected between the main body portions and causing a current to flow through the electric circuit.

  The electric circuit breaker according to the present invention is characterized in that the moving body includes a second arc extinguishing space on the opposite side of the first arc extinguishing space with the cutting member interposed therebetween.

  According to the above feature, since the second arc extinguishing space is provided on the opposite side of the first arc extinguishing space with the cutting member interposed therebetween, the arc traveling from the separating piece toward the second end portion is It is released into the arc space and extinguished.

  In the electric circuit breaker according to the present invention, the housing includes a third arc extinguishing space for accommodating an arc extinguishing material outside the cylindrical portion, and the third arc extinguishing space is inserted through the main body portion. It is characterized by being housed.

  According to the above feature, since the main body portion of the cut portion is inserted and accommodated in the third arc extinguishing space, the arc generated from the main body portion is extinguished by the arc extinguishing material in the third arc extinguishing space. It can be done.

  The electric circuit breaker according to the present invention is characterized in that a part of the main body portion of the cut portion includes a bent portion bent in the third arc extinguishing space.

  According to the above feature, since the bent portion of the main body of the part to be cut is bent in the third arc extinguishing space, the contact area between the bent portion and the arc extinguishing material in the third arc extinguishing space increases. It will be. As a result, the arc extinguishing performance for extinguishing the arc generated from the main body is enhanced.

As described above, according to the electric circuit interrupting device of the present invention, it is possible to effectively extinguish an arc generated immediately after the electric circuit is interrupted.

(A) is a whole perspective view of the lower housing which comprises the housing of the electric circuit breaker concerning Embodiment 1 of this invention, (b) is a top view of a lower housing. (A) is the perspective view which looked at the upper housing which comprises the housing of the electric circuit breaker concerning Embodiment 1 of this invention from the upper surface side, (b) is the perspective view which looked at the upper housing from the lower surface side, c) is a bottom view of the upper housing. (A) is a perspective view of the moving body of the electric circuit breaker according to Embodiment 1 of the present invention, (b) is a front view of the moving body, and (c) is a side view of the moving body. (A) is a perspective view of the part to be cut of the electric circuit breaker according to Embodiment 1 of the present invention, and (b) is a plan view of the part to be cut. 1 is an exploded perspective view of an electric circuit breaker according to Embodiment 1 of the present invention. It is AA sectional drawing in the state by which the electric circuit breaker shown in FIG. 5 was assembled. It is sectional drawing which shows a mode that the mobile body moved from the state shown in FIG. It is sectional drawing which shows a mode that the mobile body moved further from the state shown in FIG. (A) is a whole perspective view of the to-be-cut | disconnected part of the electric circuit breaker concerning Embodiment 2 of this invention, (b) is sectional drawing of an electric circuit breaker. (A) is a perspective view of the moving body of the electric circuit breaker concerning Embodiment 3 of this invention, (b) is a front view of a moving body, (c) is a side view of a moving body. It is a disassembled perspective view of the electric circuit breaker concerning Embodiment 3 of this invention. It is BB sectional drawing in the state by which the electric circuit breaker shown in FIG. 11 was assembled. It is sectional drawing which shows a mode that the mobile body moved from the state shown in FIG. (A) is a perspective view of the moving body of the electric circuit breaker concerning Embodiment 4 of this invention, (b) is a front view of a moving body, (c) is a side view of a moving body. (A) is a perspective view of the to-be-cut | disconnected part of the electric circuit breaker concerning Embodiment 4 of this invention, (b) is a top view of a to-be-cut | disconnected part. It is a disassembled perspective view of the electric circuit breaker concerning Embodiment 4 of this invention. It is CC sectional drawing in the state by which the electric circuit breaker shown in FIG. 16 was assembled. It is sectional drawing which shows a mode that the mobile body moved from the state shown in FIG. (A) is a perspective view of the moving body of the electric circuit breaker of this invention concerning Embodiment 5, (b) is a front view of the said moving body, (c) is a side view of a moving body. It is sectional drawing of the electric circuit breaker concerning Embodiment 5 of this invention. It is sectional drawing which shows a mode that the mobile body moved from the state shown in FIG. It is sectional drawing which shows a mode that the mobile body moved further from the state shown in FIG. It is sectional drawing of the conventional electric circuit breaker.

300 Housing 310 Tube portion 320 First end portion 330 Second end portion 400 Cut portion 420 Separating piece 430 Main body portion 500 Moving body 511 Cutting member P Power source X1 First arc extinguishing space M Arc extinguishing material

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the shape, material, etc. of each member of the electric circuit breaker in the embodiment described below are merely examples, and are not limited thereto.

<Embodiment 1>
First, FIG. 1 shows a lower housing 100 constituting the housing 300 according to the first embodiment of the present invention. FIG. 1A is an overall perspective view of the lower housing 100, and FIG. 1B is a plan view of the lower housing 100. The lower housing 100 is a substantially quadrangular prism body made of synthetic resin, and has a cylindrical lower cylindrical portion 110 inside, and a third arc extinguishing formed annularly around the lower cylindrical portion 110. A space X3 is provided. The lower cylindrical portion 110 extends from the upper surface 120 of the lower housing 100 toward the lower surface 130 and is configured to accommodate a moving body 500 described later. Further, the inner surface 111 of the lower cylindrical portion 110 has a smooth curved surface so that the movable body 500 can slide in the vertical direction. Furthermore, a mounting portion 113 that is recessed in accordance with the shape of the main body portion 430 is provided at a part of the upper end of the lower cylindrical portion 110 so that a main body portion 430 of the cut portion 400 to be described later can be mounted. The placement portion 113 is disposed so as to face both sides of the lower cylinder portion 110, and the placement portion 113 supports the cut portion 400 extending linearly on both sides.

  The third arc extinguishing space X <b> 3 has a groove shape extending from the upper surface 120 to the lower surface 130 of the lower housing 100, and surrounds the outer side of the lower cylindrical portion 110 in an annular shape. The third arc extinguishing space X3 is configured to accommodate an arc extinguishing material described later. The third arc extinguishing space X3 is formed in an annular shape so as to surround the lower cylindrical portion 110, but is not limited to this, for example, the mounting portion 113 of the lower cylindrical portion 110. You may form partially only in the part adjacent to. As will be described later, the arc is generated starting from an end 431 of the main body 430 that is a boundary with the separation piece 420 of the part 400 to be cut, and therefore, the mounting portion 113 that is a place where the main body 430 is accommodated. If the third arc extinguishing space X3 is provided in a portion adjacent to the arc extinguishing material, the arc extinguishing material in the third arc extinguishing space X3 can extinguish the arc.

  In addition, the upper surface 120 of the lower housing 100 includes a mounting portion 121 that is recessed in accordance with the shape of the main body portion 430 so that a main body portion 430 of the cut portion 400 described later can be mounted. The placement portion 121 is disposed so as to face both sides of the upper surface 120 and is arranged in a straight line with the placement portion 113. Therefore, the mounting part 121 can support the to-be-cut part 400 extended linearly on both sides. Further, connection holes B1 are formed at the four corners of the upper surface 120 of the lower housing 100, and the connection holes B1 are arranged so as to vertically coincide with a connection hole B2 of the upper housing 200 described later.

  Next, the upper housing 200 which comprises the housing 300 which concerns on Embodiment 1 of this invention is shown in FIG. 2A is a perspective view of the upper housing 200 viewed from the upper surface 220 side, FIG. 2B is a perspective view of the upper housing 200 viewed from the lower surface 230 side, and FIG. FIG.

  The upper housing 200 is a substantially quadrangular prism body made of synthetic resin, and is paired with the lower housing 100 shown in FIG. In addition, a cylindrical upper cylindrical portion 210 and a third arc extinguishing space X3 formed in an annular shape around the upper cylindrical portion 210 are provided. The upper cylindrical portion 210 extends from the lower surface 230 of the upper housing 200 toward the upper surface 220, and is configured to accommodate a moving body 500 described later. Further, the inner surface 211 of the upper cylindrical portion 210 is a smooth curved surface so that the movable body 500 can slide in the vertical direction. As will be described later, the upper cylindrical portion 210 is arranged vertically with the lower cylindrical portion 110 of the lower housing 100 and constitutes a linearly extending cylindrical portion 310. The inner diameter of the upper cylindrical portion 210 is as follows. The inner diameter of the lower cylindrical portion 110 is the same. Therefore, the moving body 500 can smoothly move up and down in the cylindrical portion 310.

  Further, a part of the end portion of the upper cylindrical portion 210 includes a mounting portion 213 that is recessed in accordance with the shape of a main body portion 430 of the cut portion 400 described later. The placement portion 213 is disposed so as to face both sides of the upper cylindrical portion 210 and is disposed at a position corresponding to the placement portion 113 of the lower housing 100. Therefore, the placement portion 213 is fitted from above to the main body portion 430 of the cut portion 400 placed on the placement portion 113 of the lower housing 100.

  The third arc extinguishing space X3 has a groove shape extending from the lower surface 230 of the upper housing 200 toward the upper surface 220, and surrounds the outer side of the upper cylindrical portion 210 in an annular shape. The third arc extinguishing space X3 is configured to accommodate the arc extinguishing material. The third arc extinguishing space X3 of the upper housing 200 is disposed at a position corresponding to the third arc extinguishing space X3 of the lower housing 100. When the lower housing 100 and the upper housing 200 are connected and fixed, The third arc extinguishing space X3 of the housing 100 and the third arc extinguishing space X3 of the upper housing 200 communicate with each other.

  In addition, the lower surface 230 of the upper housing 200 includes a placement portion 231 that is recessed in accordance with the shape of a main body portion 430 of the cut portion 400 described later. The placement portion 231 is disposed so as to face both sides of the lower surface 230 and is arranged in a straight line with the placement portion 213. In addition, the placement portion 231 is disposed at a position corresponding to the placement portion 121 of the lower housing 100. Therefore, the placement portion 231 is fitted from above to the main body portion 430 of the cut portion 400 placed on the placement portion 121 of the lower housing 100.

  Furthermore, a power source storage portion 221 in which the power source P is stored is formed in a part of the upper surface 220 of the upper housing 200. A communication hole 222 that communicates with the upper surface of the upper cylinder portion 210 is formed on the bottom surface side of the power source storage portion 221. Although details will be described later, power such as air pressure generated from the power source P housed in the power source housing portion 221 is transmitted to the upper tube portion 210 through the communication hole 222 and moved in the upper tube portion 210. The body 500 is moved. Further, a through hole B3 is formed in the upper surface 220, and the through hole B3 communicates with the third arc extinguishing space X3 inside the upper housing 200. Therefore, after assembling the housing 300, the arc extinguishing material can be caused to flow into the third arc extinguishing space X3 from the outside through the through hole B3. The lower housing 100 and the upper housing 200 are substantially quadrangular prisms made of synthetic resin, but are not limited to this, as long as they have high insulating properties and can withstand use. It is good also as arbitrary shapes with another material.

  Next, a moving body 500 according to Embodiment 1 of the present invention is shown in FIG. 3A is a perspective view of the moving body 500, FIG. 3B is a front view of the moving body 500, and FIG. 3C is a side view of the moving body 500. The moving body 500 is a substantially cylindrical body made of synthetic resin and having an upper surface 560 and a lower surface 520. The outer diameter of the moving body 500 is equal to or smaller than the inner diameter of the cylindrical portion 310, and the outer surface 530 of the moving body 500 is a smooth surface corresponding to the inner surface shape of the cylindrical portion 310. The inside of the cylinder part 310 can be smoothly slid without a gap.

  In addition, on the lower surface 520 side of the moving body 500, a penetrating portion 540 that penetrates the moving body 500 from the front surface to the back surface is provided from one outer surface 530 to the opposite outer surface 530. , A lower wall 541, a side wall 542, a side wall 543, and an upper wall 544. Furthermore, a protruding portion 510 protrudes from the upper wall 544 toward the lower wall 541 inside the through portion 540. A first arc extinguishing space X1 that is recessed inward from the outer surface 530 is formed on the base side of the protruding portion 510. Note that the space between the cutting member 511 and the lower wall 541 of the penetrating portion 540 is more than the cut portion 400 so that the separation piece 420 and the main body portion 430 of the cut portion 400 can be inserted as will be described later. It is getting bigger.

  Further, a cutting member 511 is formed on the distal end side of the protruding portion 510. As shown in FIG. 3B, the cutting member 511 has a substantially U-shaped longitudinal section, and comes into contact with the contact surface 512 that contacts the surface of the separation piece 420 of the part 400 to be cut. The holding surface 513 protrudes from both sides of the surface 512 and sandwiches the side surface 423 of the separation piece 420.

  The first arc extinguishing space X1 is disposed on the opposite side of the separation piece 420 across the cutting member 511 so as to be adjacent to the cutting member 511 and has a shape that is recessed inward from the outer surface 530 of the movable body 500. ing. An arc extinguishing material can be optionally stored in the first arc extinguishing space X1. Furthermore, the arc extinguishing material can be optionally stored in the second arc extinguishing space X2 between the cutting member 511 and the lower wall 541. Similarly, the arc extinguishing material can be optionally stored in the fourth arc extinguishing space X4 between the protrusion 510 and each of the side wall 542 and the side wall 543. Therefore, the periphery of the separation piece 420 of the part 400 to be cut arranged so as to contact the cutting member 511 can be surrounded by the arc extinguishing material.

  An insulating space 550 that is recessed inward from the outer surface 530 is formed on the upper surface 560 side of the moving body 500. The insulating spaces 550 are formed at positions facing the outer surface 530, respectively. The insulating space 550 is surrounded by a lower wall 551, a side wall 552, a side wall 553, an upper wall 554, and a rear wall 555. As shown in FIG. 3C, the insulating spaces 550 arranged so as to face each other are cut off from each other by the rear wall 555, and are insulated from each other. And the arc-extinguishing material is not accommodated in the insulating space 550, and the arc is confined and blocked as will be described later. Further, the insulating space 550 and the penetrating portion 540 are isolated from each other by the lower wall 551 and the upper wall 544, and are independent spaces insulated from each other. Similarly, the insulating space 550 and the first arc extinguishing space X1 are also isolated from each other by the lower wall 551 and the upper wall 544, and are independent spaces insulated from each other.

  The moving body 500 has a cylindrical shape made of synthetic resin, but is not limited to this, and any other material may be used as long as it has high insulation and strength to withstand use. Good.

  Next, FIG. 4 shows a part to be cut 400 that constitutes a part of an electric circuit that is interrupted by the electric circuit interrupter 600 according to the first embodiment of the present invention. 4A is a perspective view of the cut portion 400, and FIG. 4B is a plan view of the cut portion 400. FIG. The cut portion 400 is entirely made of a metal conductor so as to be electrically connected to the electric circuit, and is separated from the main body portion 430 to be connected to the electric circuit at both ends and substantially at the center. Separation piece 420 to be provided. A connection hole 410 is formed at the end of the main body 430 to be used when connecting to an electric circuit. In addition, cuts 421 are formed on both sides of the separation piece 420 so that the separation piece 420 is cut and easily separated. The contact surface 512 of the cutting member 511 of the moving body 500 shown in FIG. 3 is in contact with the surface 422 of the separation piece 420, and the sandwiching surfaces 513 of the cutting member 511 are in contact with the side surfaces 423 on both sides.

  Next, how to assemble the electric circuit breaker 600 of the present invention will be described with reference to FIG. FIG. 5 shows an exploded perspective view of the electric circuit breaker 600.

  First, in the penetrating portion 540 of the moving body 500, the main body portion 430 of the cut portion 400 is inserted between the cutting member 511 and the lower wall 541, and the separation piece 420 of the cut portion 400 is attached to the cutting member 511 of the moving body 500. The part to be cut 400 is inserted until facing each other. Then, as shown in FIG. 5, the separation piece 420 of the part to be cut 400 is inserted and accommodated inside the moving body 500.

  Next, the movable body 500 is inserted into the lower cylindrical portion 110 of the lower housing 100 from the lower surface 520 side. Then, the main body 430 of the part to be cut 400 is placed so as to be fitted to the placement part 113 and the placement part 121 of the lower housing 100, and the moving body 500 is fixed in the lower cylinder part 110. become. Next, the upper housing 200 is fitted from above the lower housing 100 so that the upper surface 560 of the moving body 500 is inserted into the upper cylindrical portion 210 of the upper housing 200. Then, when the upper housing 200 is pushed toward the lower housing 100, the placement portion 213 and the placement portion 231 of the upper housing 200 are fitted to the main body portion 430 of the cut portion 400. The housing 300 composed of the lower housing 100 and the upper housing 200 accommodates the cut portion 400 and the moving body 500 inside by connecting and fixing the connecting holes B1 and B2 arranged vertically. Can be assembled.

  Further, a power source P is attached to the power source storage portion 221 of the upper housing 200. When an abnormal signal is input from the outside when an abnormal current flows in the electric circuit, for example, the power source P explodes explosives inside the power source P, and the air pressure caused by the explosion The moving body 500 is instantaneously pushed out and moved in the cylindrical portion 310. The power source P is not limited to a power source using explosives as long as it generates power for moving the moving body 500, and other known power sources may be used.

  Next, the internal structure of the electric circuit breaker 600 according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view taken along the line AA in a state where the electric circuit breaker 600 shown in FIG. 5 is assembled.

  As shown in FIG. 6, the moving body 500 is accommodated in a cylindrical portion 310 configured by a lower cylindrical portion 110 and an upper cylindrical portion 210 arranged in a straight line. The cylindrical portion 310 extends from the first end portion 320 of the housing 300 to the second end portion 330 on the opposite side of the first end portion 320. And since the mobile body 500 is arrange | positioned at the 1st end part 320 side in which the power source P is arrange | positioned, the 2nd end part 330 side of the cylinder part 310 is a cavity. Therefore, as will be described later, the moving body 500 can move to the second end portion 330 side while cutting and separating the separation piece 420. Further, the upper surface 560 of the moving body 500 is adjacent to the power source P attached in the power source storage unit 221. Then, as will be described later, the air pressure due to the explosion of the explosive in the power source P is transmitted to the upper surface 560 of the moving body 500 through the communication hole 222.

  Further, the separation piece 420 of the part to be cut 400 is inserted and accommodated inside the moving body 500, and the main body part 430 of the part to be cut 400 is inserted and accommodated inside the third arc extinguishing space X3. The second arc extinguishing space X2 is disposed on the opposite side of the first arc extinguishing space X1 with the cutting member 511 interposed therebetween. As shown in FIG. 6, a granular arc extinguishing material M is accommodated in the first arc extinguishing space X1 and the third arc extinguishing space X3. Moreover, since the arc-extinguishing material M is filled in the penetrating portion 540 of the moving body 500, the arc-extinguishing material M is also applied to the second arc extinguishing space X2 and the fourth arc extinguishing space X4 (see FIG. 3) of the penetrating portion 540. Will be stored. 6 to 8, the arc extinguishing material M is filled in the first arc extinguishing space X1, the second arc extinguishing space X2, the third arc extinguishing space X3, and the fourth arc extinguishing space X4. In the drawing, only a part of the arc extinguishing material M is displayed in consideration of easy viewing.

  In addition, although the arc extinguishing material M was accommodated in the 1st arc extinguishing space X1, it is not limited to this, The arc extinguishing material M does not need to be accommodated. The first arc extinguishing space X1 is a space recessed inward, and as will be described later, an arc generated from the end 431 of the main body 430 is discharged into the first arc extinguishing space X1. Then, the arc consumes energy when traveling through the air in the first arc extinguishing space X1, and eventually extinguishes. Therefore, even if the arc extinguishing material M is not accommodated in the first arc extinguishing space X1, the first arc extinguishing space X1 can sufficiently extinguish the arc. Similarly, the arc extinguishing material M is accommodated in the second arc extinguishing space X2 and the fourth arc extinguishing space X4. However, the present invention is not limited to this, and the arc extinguishing material M may not be accommodated.

  Furthermore, when the arc extinguishing material M is accommodated in the first arc extinguishing space X1, the second arc extinguishing space X2, the third arc extinguishing space X3, or the fourth arc extinguishing space X4, the arc extinguishing material M is a granular material such as silica sand. The solid arc extinguishing material is not limited to this, and each space may be filled with a gaseous arc extinguishing material that can effectively extinguish an arc such as nitrogen gas.

  Next, how the electric circuit breaker 600 according to Embodiment 1 of the present invention is used will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a state in which the moving body 500 has moved from the state shown in FIG. As shown in FIG. 7, when an abnormality such as an overcurrent flowing in the electric circuit is detected, an abnormality signal is input to the power source P, and the explosive in the power source P explodes. Then, the air pressure due to the explosion is instantaneously transmitted to the upper surface 560 of the moving body 500 through the communication hole 222. Then, due to the air pressure, the moving body 500 is blown out vigorously from the first end portion 320 toward the second end portion 330, and instantaneously moves in the cylinder portion 310 toward the second end portion 330.

  Then, the cutting member 511 of the moving body 500 cuts the separation piece 420 and separates it from the main body portion 430 by the force with which the moving body 500 is pushed toward the second end portion 330. The separating piece 420 moves toward the second end 330 together with the moving body 500 and moves away from the main body 430. Further, as shown in FIG. 7, when the moving body 500 moves in the cylindrical portion 310 toward the second end portion 330, the first arc extinguishing space X1 formed adjacently above the cutting member 511 is It moves to a position facing the main body 430. Therefore, immediately after the cutting member 511 of the moving body 500 cuts the separation piece 420, the first arc extinguishing space X <b> 1 is configured to be located between the separation piece 420 and the main body 430. Immediately after the cutting member 511 of the moving body 500 cuts the separation piece 420, the physical distance between the separation piece 420 and the main body 430 is short, and therefore, at the boundary between the separation piece 420 and the separation piece 420. An arc may occur between the end 431 of the main body 430. However, as shown in FIG. 7, the arc generated from the end 431 of the main body 430 is discharged to the first arc extinguishing space X1 located between the separation piece 420 and the main body 430 to be extinguished. It is. Furthermore, since the arc extinguishing material M is accommodated in the first arc extinguishing space X1, the arc can be extinguished more effectively.

  Next, how the moving body 500 has further moved toward the second end portion 330 will be described with reference to FIG. FIG. 8 is a cross-sectional view showing a state where the moving body 500 has further moved from the state shown in FIG. As shown in FIG. 8, when the moving body 500 moves in the cylindrical portion 310 toward the second end portion 330, the insulating space 550 formed above the first arc extinguishing space X <b> 1 faces the main body portion 430. And it moves to the adjacent position. Even when a high voltage is applied between the main body portions 430 on both sides and an arc is generated from the end portion 431 of the main body portion 430, the arc is confined in the insulating space 550. Since the arc generated between the main body parts 430 on both sides is confined in the insulating space 550 and insulated from each other, it is possible to prevent the arc from being connected between the main body parts 430 on both sides and flowing current to the electric circuit. is there. Note that the arc is confined and insulated in the insulating space 550, specifically, the insulating space 550 is surrounded by the lower wall 551, the side wall 552, the side wall 553, the upper wall 554, and the rear wall 555. The arc generated from the end portion 431 of one main body portion 430 is prevented from traveling by the insulating space 550 and proceeds toward the main body portion 430 on the opposite side. It is a state that cannot be done.

  In addition, it is desirable not to store the arc extinguishing material M in the insulating space 550. When the arc extinguishing material M is accommodated in the insulating space 550, the arc extinguishing material M may be exposed to high temperature and carbonized by the arc generated from the main body 430. The carbonized portion becomes a path through which a current can flow, and the arc easily leaks from the insulating space 550. Then, the arc leaking from the insulating space 550 may travel along the outer surface 530 of the moving body 500 and be connected to the arc generated from the opposite main body 430. Therefore, it is desirable not to store the arc extinguishing material M in the insulating space 550. The insulating space 550 may contain a material that is not carbonized by the arc.

  Thus, according to the electric circuit breaker 600 of the present invention, the moving body 500 itself includes the cutting member 511 that cuts the cut portion 400 and the first arc extinguishing space X1, and the first arc extinguishing space. X1 is between the separation piece 420 that is cut and separated immediately after the cutting member 511 cuts the separation piece 420 and interrupts the electric circuit, and the main body portion 430 that remains in the housing 300 without being separated. Configured to be located. Therefore, immediately after the electric circuit is shut off, the arc generated from the main body 430 can be discharged into the first arc extinguishing space X1 and extinguished.

  Furthermore, when the arc extinguishing material M is accommodated in the first arc extinguishing space X1, the arc generated from the main body 430 can be extinguished more effectively.

  In the prior art shown in FIG. 23, it is conceivable to enclose a granular solid arc extinguishing material in the cutting chamber 721 in order to extinguish the arc. The punching operation of the punch 730 may be hindered, and it is difficult to enclose the arc extinguishing material in the cutting chamber 721. However, in the present invention, unlike the prior art, the arc extinguishing material M can be stored in the moving body 500 itself together with the cutting member 511 instead of in the cylindrical portion 310, so that the moving body 500 moves within the cylindrical portion 310. Thus, the operation of cutting the separation piece 420 is not disturbed. Further, since the separation piece 420 is accommodated in the moving body 500 and moves together with the moving body 500, there is no possibility of hindering punch punching operation as in the prior art. And since both the arc extinguishing material M and the separation piece 420 are accommodated in the moving body 500 and move with the said moving body 500, unlike the prior art, it is possible to accommodate the arc extinguishing material M in the moving body 500 in a large amount. It can be done. Furthermore, since the first arc extinguishing space X1 can be expanded according to the volume inside the moving body 500, a large amount of the arc extinguishing material M can be accommodated, and the arc extinguishing performance of the arc is extremely high.

  Furthermore, according to the electric circuit breaker 600 of the present invention, the insulating space 550 is configured to face the main body 430 of the cut portion 400 remaining in the housing 300 after the moving body 500 further moves. Even if a high voltage is applied to the main body 430 on both sides and an arc is generated from the main body 430, the arc is confined in the insulating space 550 and insulated from each other. It is possible to prevent current from flowing through the circuit.

  Furthermore, according to the electric circuit breaker 600 of the present invention, since the second arc extinguishing space X2 is provided on the side opposite to the first arc extinguishing space X1 with the cutting member 511 interposed therebetween, The arc traveling toward the end 330 is discharged into the second arc extinguishing space X2 and extinguished. Furthermore, when the arc extinguishing material M is accommodated in the second arc extinguishing space X2, the arc can be extinguished more effectively. Further, since the second arc extinguishing space X2 is located on the lower surface side of the separating piece 420, the arc generated in the separating piece 420 is extinguished over a wide range by the arc extinguishing material M in the second arc extinguishing space X2. It is.

  Furthermore, according to the electric circuit breaker 600 of the present invention, since the main body 430 of the part to be cut 400 is inserted and accommodated in the third arc extinguishing space X3, the arc generated from the main body 430 is The arc can be extinguished by the arc extinguishing material M in the three arc extinguishing spaces X3. In particular, an arc generated between the separation piece 420 and the main body 430 can be extinguished by the first arc extinguishing space X1, but when the arc extinguishing performance is improved, the first arc extinguishing space X1 is enlarged. It is necessary to increase the arc extinguishing area. However, when the first arc-extinguishing space X1 is expanded, the structure around the moving body 500 including the first arc-extinguishing space X1 and the cylindrical portion 310 that moves the moving body 500 is also increased. However, it is desirable that the drive portions such as the cylindrical portion 310 and the moving body 500 be made as small as possible for the performance and safety of the electric circuit breaker 600. Therefore, by providing the third arc extinguishing space X3 that accommodates the main body 430 of the to-be-cut portion 400 on the outside of the cylindrical portion 310 that moves the movable body 500, the cylindrical portion 310 and the movable body 500 are enlarged. The arc extinguishing performance of the arc generated from the main body 430 is improved.

  In the first embodiment shown in FIGS. 1 to 8, the insulating space 550 is provided at an adjacent position above the first arc extinguishing space X1, but the present invention is not limited to this, and the insulating space 550 may not be provided. Good. In this case, the first arc extinguishing space X1 is extended to the position of the insulating space 550. This configuration will be described in more detail later with reference to FIGS.

<Embodiment 2>
Next, an electric circuit breaker 600A according to the second embodiment of the present invention will be described with reference to FIG. 9A is an overall perspective view of the cut portion 400A of the electric circuit breaker 600A according to the second embodiment of the present invention, and FIG. 9B is an electric circuit according to the first embodiment shown in FIG. Similarly to the cross-sectional view of the breaker 600, a cross-sectional view of the electric circuit breaker 600A according to the second embodiment is shown. The configuration of the electric circuit breaker 600A according to the second embodiment is basically the same as that of the electric circuit breaker 600 according to the first embodiment except for the configuration of the part to be cut 400A. Is omitted.

  As shown in FIG. 9, the cut portion 400A of the electric circuit breaker 600A includes a central separation piece 420A, and a main body 430A on both sides of the separation piece 420A. Further, a part of the main body 430A is a bent portion 440A that is bent so as to rise from the separation piece 420A. As shown in FIG. 9B, the bent portion 440A of the cut portion 400A is bent along the vertical direction in which the third arc extinguishing space X3A expands within the third arc extinguishing space X3A of the housing 300A. . Therefore, the contact area between the bent portion 440A and the arc extinguishing material MA in the third arc extinguishing space X3A is such that the main body portion 430 and the arc extinguishing material inserted linearly into the third arc extinguishing space X3 shown in FIG. The contact area with M increases. As a result, in the electric circuit breaker 600A, the arc extinguishing performance for extinguishing the arc generated from the main body 430A is enhanced.

  In FIG. 9, the bent portion 440A of the cut portion 400A rises from the separation piece 420A and is bent along the vertical direction in which the third arc extinguishing space X3A expands, but is not limited thereto. The bent portion 440A may have any shape as long as it is bent in the third arc extinguishing space X3A so as to increase the contact area with the arc extinguishing material MA.

<Embodiment 3>
Next, an electric circuit breaker 600B of the present invention according to Embodiment 3 will be described with reference to FIGS. 10A is a perspective view of the moving body 500B of the electric circuit breaker 600B according to the third embodiment of the present invention, FIG. 10B is a front view of the moving body 500B, and FIG. 10C is the moving body 500B. It is a side view. In addition, the configuration of the electric circuit interrupter 600B according to the third embodiment is related to the first embodiment except that the moving body 500B does not include an insulating space and the housing 300B does not include the third arc extinguishing space X3. Since it is basically the same as the configuration of the electric circuit breaker 600, detailed description of the same configuration is omitted.

  As shown in FIG. 10, the moving body 500B is a substantially rectangular parallelepiped made of synthetic resin and having an upper surface 560B and a lower surface 520B. Further, a penetrating part 540B is provided from the upper surface 560B side to the lower surface 520B side of the moving body 500B from one outer surface 530B to the outer surface 530B on the opposite side, that is, through the moving body 500B from the front surface to the back surface. The part 540B is surrounded by the lower wall 541B, the side wall 542B, the side wall 543B, and the upper wall 544B.

  Further, a protruding portion 510B protrudes from the upper wall 544B toward the lower wall 541B inside the through portion 540B. A cutting member 511B is formed on the distal end side of the protruding portion 510B, and the lower surface of the cutting member 511B is a flat contact surface 512B that contacts the surface of the separation piece 420B of the cut portion 400B. . Further, a first arc extinguishing space X1B that is recessed inward from the outer surface 530B is formed on the base side of the protruding portion 510B.

  The first arc extinguishing space X1B is a long space extending from the cutting member 511B toward the upper surface 560B, and an arc extinguishing material can be arbitrarily stored therein. Further, the arc extinguishing material can be stored also in the second arc extinguishing space X2B between the cutting member 511B and the lower wall 541B. Similarly, the arc extinguishing material can also be stored in the fourth arc extinguishing space X4B between the protruding portion 510B and the side walls 542B and 543B. Therefore, the periphery of the separation piece 420B of the part to be cut 400B disposed so as to contact the cutting member 511B can be surrounded by the arc extinguishing material. In addition, although arc-extinguishing material MB was accommodated in 1st arc extinguishing space X1B, it is not limited to this, It is not necessary to accommodate arc-extinguishing material MB. Similarly, the arc extinguishing material MB is accommodated in the second arc extinguishing space X2B and the fourth arc extinguishing space X4B. However, the present invention is not limited to this, and the arc extinguishing material MB may not be accommodated.

  Next, how to assemble the electric circuit breaker 600B of the present invention will be described with reference to FIG. FIG. 11 shows an exploded perspective view of the electric circuit breaker 600B.

  First, in the penetrating portion 540B of the moving body 500B, the main body portion 430B of the cut portion 400B is inserted between the cutting member 511B and the lower wall 541B, and the separation piece 420B of the cut portion 400B becomes the cutting member 511B of the moving body 500B. The cut portion 400B is inserted until facing each other. Then, as shown in FIG. 11, the separation piece 420B of the cut portion 400B is inserted and accommodated inside the moving body 500B.

  Next, the moving body 500B is inserted into the lower cylindrical portion 110B of the lower housing 100B from the lower surface 520B side. Then, the main body 430B of the cut portion 400B is placed so as to be fitted to the placement portion 121B of the lower housing 100B, and the moving body 500B is fixed in the lower cylindrical portion 110B. Next, the upper housing 200B is fitted over the lower housing 100B so that the upper surface 560B of the moving body 500B is inserted into the upper cylindrical portion 210B of the upper housing 200B. Then, if the upper housing 200B and the lower housing 100B are connected and fixed to each other, the housing 300B including the lower housing 100B and the upper housing 200B is assembled in a state in which the cut portion 400B and the moving body 500B are accommodated therein.

  Furthermore, a power source PB is attached to the power source storage portion 221B of the upper housing 200B. The lower cylindrical portion 110B of the lower housing 100B and the upper cylindrical portion 210B of the upper housing 200B are cross-sectionally matched to the shape of the movable body 500B so that the movable body 500B is accommodated and slid therein. Has a substantially quadrangular cylindrical shape. Further, the third arc extinguishing space is not formed around the lower cylindrical portion 110B and the upper cylindrical portion 210B, but may be appropriately formed as necessary.

  Next, the internal structure of the electric circuit breaker 600B according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 12 is a cross-sectional view taken along the line BB in a state where the electric circuit breaker 600B shown in FIG. 11 is assembled.

  As shown in FIG. 12, the moving body 500B is accommodated in a cylindrical portion 310B composed of a lower cylindrical portion 110B and an upper cylindrical portion 210B arranged in a straight line. The cylindrical portion 310B extends from the first end portion 320B of the housing 300B to the second end portion 330B opposite to the first end portion 320B. And since the mobile body 500B is arrange | positioned at the 1st end part 320B side in which the power source PB is arrange | positioned, while the mobile body 500B cut | disconnects and isolate | separates the separation piece 420B so that it may mention later, It can move to the end 330B side.

  Moreover, as shown in FIG. 12, granular arc-extinguishing material MB is accommodated in the first arc extinguishing space X1B. Furthermore, since the arc-extinguishing material MB is filled in the penetrating portion 540B of the moving body 500B, the arc-extinguishing material M is also applied to the second arc extinguishing space X2B and the fourth arc extinguishing space X4B (see FIG. 10) of the penetrating portion 540B. Will be stored.

  Next, how the electric circuit breaker 600B according to Embodiment 3 of the present invention is used will be described with reference to FIG. FIG. 13 is a cross-sectional view showing a state where the moving body 500B has moved from the state shown in FIG. As shown in FIG. 13, when an abnormality such as an overcurrent flowing in the electric circuit is detected, an abnormality signal is input to the power source PB, and the explosive in the power source PB explodes. Then, the air pressure resulting from the explosion is instantaneously transmitted to the upper surface 560B of the moving body 500B through the communication hole 222B, and the moving body 500B is blown away from the first end portion 320B toward the second end portion 330B. The inside moves instantaneously toward the second end portion 330B.

  Then, the cutting member 511B of the moving body 500B cuts and separates the separation piece 420B from the main body 430B by the force with which the moving body 500B is pushed toward the second end portion 330B. Then, the separation piece 420B moves toward the second end portion 330B together with the moving body 500B and moves away from the main body portion 430B. As shown in FIG. 13, when the moving body 500B moves toward the second end portion 330B in the cylindrical portion 310B, the first arc extinguishing space X1B formed adjacent to the cutting member 511B becomes the main body portion. It moves to the position facing 430B. Therefore, immediately after the cutting member 511B of the moving body 500B cuts the separation piece 420B, the first arc extinguishing space X1B is configured to be positioned between the separation piece 420B and the main body portion 430B. Then, immediately after the cutting member 511B of the moving body 500B cuts the separation piece 420B, even if an arc is generated between the separation piece 420B and the end portion 431B of the main body portion 430B, from the end portion 431B of the main body portion 430B. The generated arc is discharged into the first arc extinguishing space X1B located between the separation piece 420B and the main body 430B, and is extinguished. Furthermore, since the arc extinguishing material MB is accommodated in the first arc extinguishing space X1B, the arc can be extinguished more effectively.

  Thus, according to the electric circuit breaker 600B of the present invention, the moving body 500B itself includes the cutting member 511B that cuts the cut portion 400B and the first arc extinguishing space X1B, and the first arc extinguishing space. X1B is between the separation piece 420B that is cut and separated immediately after the cutting member 511B cuts the separation piece 420B and cuts off the electric circuit, and the main body 430B that remains in the housing 300B without being separated. Configured to be located. Therefore, immediately after the electric circuit is cut off, the arc generated from the main body 430B can be discharged into the first arc extinguishing space X1B and extinguished.

  Furthermore, when the arc extinguishing material M is accommodated in the first arc extinguishing space X1B, the arc generated from the main body 430B can be extinguished more effectively.

  In the prior art shown in FIG. 23, it is conceivable to enclose a granular solid arc extinguishing material in the cutting chamber 721 in order to extinguish the arc. The punching operation of the punch 730 may be hindered, and it is difficult to enclose the arc extinguishing material in the cutting chamber 721. However, in the present invention, unlike the prior art, the arc extinguishing material MB can be stored in the moving body 500B itself together with the cutting member 511B, not in the cylindrical portion 310, so that the moving body 500B moves within the cylindrical portion 310B. Thus, the operation of cutting the separation piece 420B is not disturbed. Further, since the separation piece 420B is accommodated in the moving body 500B and moves together with the moving body 500B, there is no possibility of hindering punch punching operation as in the prior art. And since both the arc extinguishing material MB and the separation piece 420B are accommodated in the moving body 500B and move together with the moving body 500B, unlike the conventional technique, the arc extinguishing material MB can be accommodated in a large amount in the moving body 500B. It can be done. Furthermore, since the first arc extinguishing space X1B can be expanded according to the volume inside the moving body 500B, a large amount of arc extinguishing material MB can be accommodated, and the arc extinguishing performance of the arc is extremely high.

  Further, since the first arc extinguishing space X1B extends in a long shape upward from the cutting member 511B, a large amount of arc extinguishing material MB can be accommodated therein. Furthermore, even in the process in which the moving body 500B moves toward the second end portion 330B below, the first arc extinguishing space X1B extending vertically is formed between the separation piece 420B and the main body portion 430B. It can be positioned reliably.

<Embodiment 4>
Next, an electric circuit breaker 600C of the present invention according to Embodiment 4 will be described with reference to FIGS. In addition, in the electric circuit breaker 600C of the present invention according to the fourth embodiment, a bent portion 440A can be used together as in the cut portion 400A of the electric circuit breaker 600A according to the second embodiment shown in FIG.

  First, in the electric circuit breaker 600 according to the first embodiment, as shown in FIG. 7, the cut portion 400, which is a conductor electrically connected to the electric circuit, is physically cut to cut off the electric circuit. Was. For example, when a relatively low abnormal current flows in an electric circuit, if the electric circuit is to be interrupted, the section to be cut 400 may be physically disconnected by the electric circuit interrupter 600 according to the first embodiment. . On the other hand, if a relatively high abnormal current flows in the electric circuit, for example, if the electric circuit is to be interrupted, a fuse with a predetermined rating is connected in the electric circuit, and the fuse is blown by the abnormal current. And the electric circuit may be cut. As described above, when the electric circuit breaker 600 according to the first embodiment and the fuse are connected in series in the electric circuit and a relatively low abnormal current flows, the electric circuit breaker 600 causes the electric circuit to be connected. When a relatively high abnormal current flows, the fuse is blown and the electric circuit is disconnected. Also, even if the electric circuit breaker 600 does not operate normally and the electric circuit cannot be cut off, the fuse connected in series to the electric circuit breaker 600 will eventually blow, so that the electric circuit can be reliably protected. .

  However, in order to cope with each predetermined abnormal current, when both the part to be cut 400 cut by the electric circuit breaker 600 according to the first embodiment and the fuse blown by the predetermined abnormal current are connected in series to the electric circuit. Then, there is a need for a space for arranging both the electric circuit breaker 600 and the fuse in series in the electric circuit, and there are problems that the manufacturing cost of the electric circuit and peripheral members is increased and the installation space is bulky.

  Therefore, as will be described in detail later, the electric circuit breaker 600C of the present invention according to the fourth embodiment can solve the above problem. The electric circuit breaker 600C according to the fourth embodiment of the present invention also solves the problem “effectively extinguishing an arc generated immediately after the electric circuit is cut off” solved by the first to third aspects of the invention. It has been solved.

  Then, in the following FIGS. 14 to 18, the electric circuit breaker 600C of the present invention according to the fourth embodiment will be specifically described. 14A is a perspective view of the moving body 500C of the electric circuit breaker 600C of the present invention according to Embodiment 4, FIG. 14B is a front view of the moving body 500C, and FIG. 14C is the moving body 500C. It is a side view. In addition, the configuration of the electric circuit breaker 600C according to the fourth embodiment is different from the configuration of the electric circuit breaker 600 according to the first embodiment from the configuration of the moving body 500C and the configuration of the cut portion 400C. Since it is basically the same as the configuration of the electric circuit breaker 600 according to the first embodiment, detailed description of the same configuration is omitted.

  First, as shown in FIG. 14, the moving body 500 </ b> C is a substantially cylindrical body made of a synthetic resin having an upper surface 560 </ b> C and a lower surface 520 </ b> C. Since the outer diameter of the moving body 500C is equal to or smaller than the inner diameter of the cylindrical portion 310 of the housing 300, and the outer surface 530C of the moving body 500C is a smooth surface corresponding to the inner surface shape of the cylindrical portion 310, the moving body 500C can slide smoothly inside the cylinder part 310 without a gap.

  In addition, a substantially centric portion of the moving body 500C is provided with a penetrating portion 540C penetrating from one outer surface 530C to the opposite outer surface 530C, that is, through the moving body 500C from the front surface to the rear surface. The lower wall 541C, the side wall 542C, the side wall 543C, and the upper wall 544C are surrounded. A space surrounded by the lower wall 541C, the side wall 542C, the side wall 543C, and the upper wall 544C and recessed inward from the outer surface 530C is a first arc extinguishing space X1C. And in this 1st arc extinguishing space X1C, the separation piece 420C of the to-be-cut part 400C mentioned later can be inserted and accommodated. Moreover, since the arc extinguishing material described later is filled in the first arc extinguishing space X1C, the periphery of the separation piece 420C of the cut portion 400C accommodated in the first arc extinguishing space X1C is made of arc extinguishing material. It can be completely enclosed.

  The moving body 500C is not provided with a cutting member for cutting the separation piece 420C of the part 400C to be cut. In addition, the moving body 500C has a cylindrical shape made of synthetic resin, but is not limited to this, and any other material may be used as long as it has high insulation and strength to withstand use. Good.

  Next, FIG. 15 shows a part to be cut 400C that constitutes a part of the electric circuit cut off by the electric circuit breaker 600C according to the fourth embodiment of the present invention. 15A is a perspective view of the cut portion 400C, and FIG. 4B is a plan view of the cut portion 400C. The cut portion 400C is composed of a metal fuse as a whole for electrical connection with the electric circuit, and is separated from the main body portion 430C for connection with the electric circuit at both ends and substantially at the center. Separation piece 420C. A connection hole 410C used when connecting to an electric circuit is formed at the end of the main body 430C. Further, a cutout 421C and a through hole 424C are provided at the center and both ends of the separation piece 420, and a fusing part 425C having a locally narrow width is formed. The fusing part 425C is a part that generates heat and blows when an abnormal current flows in the electric circuit.

  Note that the cut portion 400C having the fuse function shown in FIG. 15 is thinner than the cut portion 400 having no fuse function shown in FIG. By reducing the thickness of the to-be-cut portion 400C, the thickness of the fusing portion 425C is also reduced, and it is easy to blow out when an abnormal current flows.

  Next, how to assemble the electric circuit breaker 600C according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 16 is an exploded perspective view of the electric circuit breaker 600C.

  First, the main body 430C of the cut portion 400C is inserted into the first arc extinguishing space X1C of the moving body 500C, and the separation piece 420C of the cut portion 400C is accommodated in the first arc extinguishing space X1C of the moving body 500. The part to be cut 400C is inserted.

  Next, the moving body 500C is inserted into the lower cylindrical portion 110 of the lower housing 100 from the lower surface 520C side. Then, the main body portion 430C of the cut portion 400C is placed so as to be fitted to the placement portion 113 and the placement portion 121 of the lower housing 100, and the moving body 500C is fixed in the lower cylindrical portion 110. become. Next, the upper housing 200 is fitted over the lower housing 100 so that the upper surface 560C of the moving body 500C is inserted into the upper cylindrical portion 210 of the upper housing 200. When the upper housing 200 is pushed toward the lower housing 100, the mounting portion 213 and the mounting portion 231 of the upper housing 200 are fitted into the main body portion 430C of the cut portion 400C. The housing 300 composed of the lower housing 100 and the upper housing 200 accommodates the cut portion 400C and the moving body 500C inside by connecting and fixing the connecting holes B1 and B2 arranged in the vertical direction with a connecting tool or the like. It is assembled in the state.

  Further, a power source P is attached to the power source storage portion 221 of the upper housing 200. When an abnormal signal is input from the outside when an abnormal current flows in the electric circuit, for example, the power source P explodes explosives inside the power source P, and the air pressure caused by the explosion The moving body 500C is instantaneously pushed out and moved in the cylindrical portion 310. The power source P is not limited to a power source using explosives as long as it generates power to move the moving body 500C, and other known power sources may be used.

  Next, the internal structure and usage of an electric circuit breaker 600C according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 17 is a cross-sectional view taken along the line CC in a state where the electric circuit breaker 600C shown in FIG. 16 is assembled.

  As shown in FIG. 17, the moving body 500 </ b> C is accommodated in a cylinder part 310 configured by a lower cylinder part 110 and an upper cylinder part 210 arranged in a straight line. The cylindrical portion 310 extends from the first end portion 320 of the housing 300 to the second end portion 330 on the opposite side of the first end portion 320. Since the moving body 500C is disposed on the first end portion 320 side where the power source P is disposed, the second end portion 330 side of the cylindrical portion 310 is hollow. Therefore, as will be described later, the moving body 500C can move to the second end portion 330 side while cutting and separating the separation piece 420C. The upper surface 560C of the moving body 500C is adjacent to the power source P attached in the power source storage unit 221. Then, as will be described later, the air pressure due to the explosion of the explosive in the power source P is transmitted to the upper surface 560C of the moving body 500C through the communication hole 222.

  Moreover, as shown in FIG. 17, the granular arc extinguishing material M is accommodated in the 1st arc extinguishing space X1C and the 3rd arc extinguishing space X3. Since the separation piece 420C of the cut portion 400C is inserted and accommodated inside the first arc extinguishing space X1C of the moving body 500C, the periphery of the fusing portion 425C of the cut portion 400C is covered with the arc extinguishing material M. It is in a broken state. Further, the main body portion 430C of the cut portion 400C is inserted and accommodated inside the third arc extinguishing space X3. In FIG. 17 and FIG. 18, the arc extinguishing material M is filled in the entire first arc extinguishing space X1C and the entire third arc extinguishing space X3. Only a part of the material M is displayed.

  When a relatively high abnormal overcurrent flows in the electric circuit, the fusing part 425C of the cut part 400C connected to the electric circuit generates heat and blows. As a result, the electrical circuit is interrupted and protected from overcurrent. Furthermore, even when an arc is generated from the vicinity of the remaining melted part 425C at the time of or after the melted part 425C of the cut part 400C, the arc is effectively extinguished by the arc extinguishing material M around the melted part 425C. It is. In addition, the part to be cut 400C is accommodated in the first arc extinguishing space X1C filled with the arc extinguishing material M, and the part to be cut 400C is in direct contact with the moving body 500C in the first arc extinguishing space X1C. Not done. Therefore, even if an arc is generated from the cut portion 400C, the synthetic resin moving body 500C can be prevented from being carbonized.

  Moreover, as shown in FIG. 17, there is a slight gap between the placement portion 213 of the upper housing 200 and the placement portion 113 of the lower housing 100, and the arc extinguishing material M is accommodated in the clearance. Be able to. In this gap, since the arc extinguishing material M is filled around the main body 430C of the cut portion 400C, the main body 430C is mounted on the mounting portion 213 of the upper housing 200 and the lower housing 100. It is not in direct contact with the mounting portion 113. Therefore, even if an arc is generated from the periphery of the main body 430C of the cut portion 400C, the arc extinguishing material M accommodated in the gap extinguishes the arc, and the mounting portion 213 and the lower housing 100 of the upper housing 200 are extinguished. It is possible to prevent the mounting portion 113 from being carbonized. In addition, since the generation | occurrence | production condition of an arc also changes according to the magnitude | size of the voltage applied to the to-be-cut part 400C, depending on the generation | occurrence | production condition of an arc, the main-body part 430C of the to-be-cut part 400C is not provided in the upper housing 200. The placement portion 213 and the placement portion 113 of the lower housing 100 may be in direct contact with each other.

  As described above, when a relatively high abnormal overcurrent flows in the electric circuit, the cut portion 400 </ b> C constituted by the fuse is melted to cut off the electric circuit. On the other hand, when an overcurrent below the rating of the fuse flows in the electric circuit, for example, when a relatively low abnormal overcurrent flows in the electric circuit, the cut portion 400C constituted by the fuse does not melt. Therefore, as will be described with reference to FIG. 18, the section to be cut 400C itself is physically cut by the electric circuit breaker 600C.

  18 is a cross-sectional view showing a state where the moving body 500C has moved from the state shown in FIG. Further, in the above description, in the case of a relatively high abnormal overcurrent, the to-be-cut portion 400C constituted by the fuse is blown to cut off the electric circuit, and when a relatively low abnormal overcurrent flows, The section to be cut 400C is physically cut by the electric circuit breaker 600C, but the invention is not limited to this. By changing the rating of the fuse, the setting of the abnormal signal input to the power source P, etc. In the case of a low abnormal overcurrent, the part to be cut 400C constituted by a fuse is blown to cut off the electric circuit, and in the case of a relatively high abnormal overcurrent, the electric circuit breaker 600C The cutting unit 400C may be physically cut. Therefore, in the following description, the overcurrent when the cut portion 400C configured by the fuse is blown is referred to as a predetermined first overcurrent, and the cut portion 400C itself is physically separated by the electric circuit breaker 600C. The overcurrent at the time of disconnection is referred to as a predetermined second overcurrent. The first overcurrent and the second overcurrent can be set to arbitrary values.

  Then, as shown in FIG. 18, when an abnormality such as a predetermined second overcurrent flowing in the electric circuit is detected, an abnormality signal is input to the power source P, and the explosive in the power source P explodes. . Then, the air pressure due to the explosion is instantaneously transmitted to the upper surface 560C of the moving body 500C through the communication hole 222. Then, due to the air pressure, the moving body 500 </ b> C is blown away from the first end portion 320 toward the second end portion 330, and instantaneously moves in the cylinder portion 310 toward the second end portion 330.

  Then, the moving body 500 </ b> C cuts the separation piece 420 </ b> C and separates it from the main body portion 430 </ b> C by the force pushed toward the second end portion 330. Specifically, since the arc extinguishing material M is filled in the first arc extinguishing space X1C, when the moving body 500C moves, the separation piece 420C also moves to the second end portion 330 together with the surrounding arc extinguishing material M. It is pushed out with a strong force instantaneously and cut from the main body 430C. Then, the separation piece 420C moves toward the second end portion 330 together with the moving body 500C and moves away from the main body portion 430C. It should be noted that the part to be cut 400C formed of a fuse is formed relatively thin because it is blown when an overcurrent flows. Therefore, even if the cutting member 511 as shown in FIG. 3 is not provided, the separation piece 420C can be sufficiently cut. Further, the arc extinguishing material M in the first arc extinguishing space X1C is not limited to a granular solid arc extinguishing material such as silica sand, and the force when the moving body 500C moves so that the separation piece 420C can be cut. Any arc extinguishing material can be adopted as long as it can be transmitted to the separation piece 420C.

  As shown in FIG. 18, even if the moving body 500C moves toward the second end portion 330 in the cylindrical portion 310, the first arc extinguishing space X1C is at a position facing the main body portion 430C. Therefore, immediately after the moving body 500C cuts the separation piece 420C, the first arc extinguishing space X1C is configured to be positioned between the separation piece 420C and the main body 430C. Immediately after the moving body 500C cuts the separation piece 420C, the physical distance between the separation piece 420C and the main body portion 430C is short, so the main body portion 430C that is the boundary between the separation piece 420C and the separation piece 420C. In some cases, an arc may occur between the end 431 </ b> C. However, as shown in FIG. 18, the arc generated from the end 431C of the main body 430C is discharged to the first arc extinguishing space X1C located between the separation piece 420C and the main body 430C, and the first extinguishing The arc is extinguished by the arc extinguishing material M in the arc space X1C.

  Further, even if the moving body 500C further moves toward the second end 330 within the cylindrical portion 310, the first arc extinguishing space X1C extending vertically is located at a position facing the main body portion 430C. Therefore, even if a voltage is applied between the main body portions 430C on both sides and an arc is generated from the end portion 431C of the main body portion 430C, the arc is extinguished by the arc extinguishing material M in the first arc extinguishing space X1C. It is possible to prevent an arc from being connected between the main body portions 430C and a current from flowing through the electric circuit. When a high voltage is applied between the main body portions 430C on both sides and the arc can not be effectively extinguished by the arc extinguishing material M, the arc is effectively confined by the insulating space 550D as will be described later with reference to FIG. Aspects may be adopted.

  Thus, according to the electric circuit breaker 600C of the present invention according to the fourth embodiment, the moving body 500C itself cuts the cut portion 400 and includes the first arc extinguishing space X1 filled with the arc extinguishing material M. The first arc-extinguishing space X1 includes a separation piece 420C that is cut and separated immediately after the separation piece 420 is cut and the electric circuit is cut off, and a main body 430C that remains in the housing 300 without being separated. It is comprised so that it may be located between. Therefore, the arc generated from the main body 430C can be effectively extinguished by the arc extinguishing material M in the first arc extinguishing space X1 immediately after the cut portion 400 is cut and the electric circuit is interrupted.

  Furthermore, according to the electric circuit breaker 600C of the present invention, when a predetermined first overcurrent flows, the cut portion 400C formed of a fuse can be melted and cut off the electric circuit, When the two overcurrents flow, the electric circuit can be cut off by physically cutting the cut portion 400C itself by the electric circuit cut-off device 600C. And since the to-be-cut part 400C provided with the fuse function is accommodated in the electric circuit breaker 600C, a space for arranging and connecting both the fuse and the electric circuit breaker in series becomes unnecessary.

  Moreover, since the part to be cut 400C is accommodated in the first arc extinguishing space X1C filled with the arc extinguishing material M, the part to be cut 400C constituted by a fuse is blown by a predetermined first overcurrent. In this case, even if an arc is generated from the cut portion 400C, the arc extinguishing material M in the first arc extinguishing space X1C effectively extinguishes the arc.

  The electric circuit breaker 600C of the present invention according to the fourth embodiment is a mode in which the cut portion 400C having a fuse function is accommodated in the electric circuit breaker 600C, but the present invention is not limited to this. 1 may employ an embodiment in which a fuse is connected in series with the electric circuit breaker 600 of the present invention according to the present invention, and any embodiment may be employed as appropriate.

  In the prior art shown in FIG. 23, it is conceivable to enclose a granular solid arc extinguishing material in the cutting chamber 721 in order to extinguish the arc. The punching operation of the punch 730 may be hindered, and it is difficult to enclose the arc extinguishing material in the cutting chamber 721. However, in the present invention, unlike the prior art, the arc extinguishing material M can be stored not in the cylindrical portion 310 but in the movable body 500C itself, so that the movable body 500C moves in the cylindrical portion 310 and is separated. The operation of cutting 420C is not disturbed. Further, since the separation piece 420C is accommodated in the moving body 500C and moves together with the moving body 500C, there is no possibility of hindering punch punching operation as in the prior art. And since both the arc extinguishing material M and the separation piece 420C are accommodated in the moving body 500C and move together with the moving body 500C, unlike the conventional technique, the arc extinguishing material M can be accommodated in a large amount in the moving body 500C. It can be done. Furthermore, since the first arc extinguishing space X1C can be expanded according to the volume inside the moving body 500C, a large amount of arc extinguishing material M can be accommodated, and the arc extinguishing performance of the arc is extremely high.

<Embodiment 5>
Next, an electric circuit breaker 600D of the present invention according to Embodiment 5 will be described with reference to FIGS. In addition, in the electric circuit breaker 600D of the present invention according to the fifth embodiment, the bent portion 440A can be used together as in the cut portion 400A of the electric circuit breaker 600A according to the second embodiment shown in FIG. 19A is a perspective view of the moving body 500D of the electric circuit breaker 600D of the present invention according to Embodiment 5, FIG. 19B is a front view of the moving body 500D, and FIG. 19C is the moving body 500D. It is a side view. The configuration of the electric circuit breaker 600D according to the fifth embodiment is basically the same as that of the electric circuit breaker 600C according to the fourth embodiment except that the moving body 500D includes an insulating space. Detailed description of the configuration of is omitted. Further, the insulating space 550D of the moving body 500D according to the fifth embodiment has the same configuration as the insulating space 550 of the moving body 500 shown in FIG.

  First, the moving body 500D is a substantially cylindrical body made of synthetic resin and provided with an upper surface 560D and a lower surface 520D. Further, on the lower surface 520D side of the moving body 500D, there is provided a through portion 540D penetrating from one outer surface 530D to the opposite outer surface 530D, that is, through the moving body 500D from the front surface to the back surface. , Lower wall 541D, side wall 542D, side wall 543D, and upper wall 544D. A space surrounded by the lower wall 541D, the side wall 542D, the side wall 543D, and the upper wall 544D and recessed inward from the outer surface 530D is a first arc extinguishing space X1D. And in this 1st arc extinguishing space X1D, the separation piece 420C of the to-be-cut part 400C mentioned later can be inserted and accommodated. Since the arc extinguishing material described later is filled in the first arc extinguishing space X1D, the arc extinguishing material is used around the separation piece 420C of the cut portion 400C accommodated in the first arc extinguishing space X1D. It can be completely enclosed.

  An insulating space 550D that is recessed inward from the outer surface 530D is formed on the upper surface 560D side of the moving body 500D. The insulating spaces 550D are formed at positions opposite to the outer surface 530D. The insulating space 550D is surrounded by a lower wall 551D, a side wall 552D, a side wall 553D, an upper wall 554D, and a rear wall 555D. Then, as shown in FIG. 19C, the insulating spaces 550D arranged so as to face each other are blocked from each other by the rear wall 555D, and are insulated from each other. And the arc-extinguishing material is not housed in the insulating space 550D, and the arc is confined and blocked as will be described later. Further, the insulating space 550D and the first arc extinguishing space X1D are blocked from each other by the lower wall 551D and the upper wall 544D, and are independent spaces that are insulated from each other.

  Next, the internal structure and usage of an electric circuit breaker 600D according to Embodiment 5 of the present invention will be described with reference to FIG. The electric circuit breaker 600D according to Embodiment 5 of the present invention is assembled in the same manner as the electric circuit breaker 600C according to Embodiment 4 of the present invention, and the moving body of the electric circuit breaker 600C shown in FIG. When 500C is replaced with the moving body 500D of the electric circuit breaker 600D shown in FIG. 19, the assembly of the electric circuit breaker 600D is completed. FIG. 20 shows an electric circuit breaker 600D according to Embodiment 5 of the present invention, and is a cross-sectional view in which the moving body 500C in FIG. 17 is replaced with a moving body 500D.

  As shown in FIG. 20, the moving body 500 </ b> D is accommodated in a cylindrical portion 310 constituted by a lower cylindrical portion 110 and an upper cylindrical portion 210 that are arranged in a straight line. A granular arc extinguishing material M is accommodated in the first arc extinguishing space X1D and the third arc extinguishing space X3. Since the separation piece 420C of the cut portion 400C is housed through the first arc extinguishing space X1D of the moving body 500D, the periphery of the fusing portion 425C of the cut portion 400C is covered with the arc extinguishing material M. It is in a broken state. 20 to 22, the arc extinguishing material M is filled in the entire first arc extinguishing space X1D and the entire third arc extinguishing space X3. Only a part of the material M is displayed.

  When a predetermined first overcurrent (for example, a relatively high abnormal overcurrent) flows in the electric circuit, the fusing part 425C of the cut part 400C connected to the electric circuit generates heat and fusing, The electrical circuit is interrupted and protected from overcurrent. Further, even when an arc is generated around the melted part 425C at the time of or after the melted part 425C of the cut part 400C, the arc is effectively extinguished by the arc extinguishing material M around the melted part 425C. is there. In addition, the part to be cut 400C is accommodated in the first arc extinguishing space X1D filled with the arc extinguishing material M, and the part to be cut 400C is not in direct contact with the moving body 500D. Therefore, even if an arc is generated from the cut portion 400C, the synthetic resin moving body 500D can be prevented from being carbonized.

  On the other hand, as shown in FIG. 21, when an abnormality such as a predetermined second overcurrent (for example, a relatively low abnormal overcurrent) flows in the electric circuit, an abnormal signal is input to the power source P. The explosive in the power source P explodes. Then, the air pressure due to the explosion is instantaneously transmitted to the upper surface 560D of the moving body 500D through the communication hole 222, and instantaneously moves in the cylindrical portion 310 toward the second end portion 330. FIG. 21 is a cross-sectional view showing a state where the moving body 500D has moved from the state shown in FIG.

  Then, the moving body 500D cuts the separation piece 420C and separates it from the main body portion 430C by the force pushed toward the second end portion 330. Specifically, since the arc extinguishing material M is filled in the first arc extinguishing space X1D, when the moving body 500D moves, the separation piece 420C also moves to the second end 330 together with the surrounding arc extinguishing material M. It is pushed out with a strong force instantaneously and cut from the main body 430C. Then, the separation piece 420C moves toward the second end portion 330 together with the moving body 500D and moves away from the main body portion 430C.

  Further, as shown in FIG. 21, immediately after the moving body 500D moves in the cylindrical portion 310 toward the second end portion 330, the first arc extinguishing space X1D is at a position facing the main body portion 430C. Therefore, immediately after the moving body 500D cuts the separation piece 420C, the first arc extinguishing space X1D is configured to be positioned between the separation piece 420C and the main body 430C. Immediately after the moving body 500D cuts the separation piece 420C, the physical distance between the separation piece 420C and the main body portion 430C is short, so the main body portion 430C that is the boundary between the separation piece 420C and the separation piece 420C. In some cases, an arc may occur between the end 431 </ b> C. However, as shown in FIG. 21, the arc generated from the end 431C of the main body 430C is discharged to the first arc extinguishing space X1D located between the separation piece 420C and the main body 430C, and the first extinguishing The arc is extinguished by the arc extinguishing material M in the arc space X1D.

  Next, how the moving body 500D further moves toward the second end portion 330 will be described with reference to FIG. FIG. 22 is a cross-sectional view showing a state where the moving body 500D has further moved from the state shown in FIG. As shown in FIG. 22, when the moving body 500D further moves toward the second end portion 330 in the cylindrical portion 310, the insulating space 550D formed above the first arc extinguishing space X1D becomes the main body portion 430C. Facing each other, it moves to the adjacent position. Even when a high voltage is applied between the main body portions 430C on both sides and an arc is generated from the end portion 431C of the main body portion 430C, the arc is confined in the insulating space 550D. Since the arc generated between the main body parts 430C on both sides is confined in the insulating space 550D and insulated from each other, it is possible to prevent the arcs from being connected between the main body parts 430C on both sides and causing current to flow in the electric circuit. is there.

  In addition, it is desirable not to store the arc extinguishing material M in the insulating space 550D. When the arc-extinguishing material M is accommodated in the insulating space 550D, the arc-extinguishing material M may be exposed to a high temperature and carbonized by the arc generated from the main body 430C, and the carbonized portion is a path through which current can flow. This is because the arc easily leaks from the insulating space 550D. Further, in the insulating space 550D, instead of the arc extinguishing material M, an insulating material that is not carbonized by an arc may be stored.

  Moreover, the electric circuit breaker of the present invention is not limited to the above-described embodiments, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. Examples and combinations are also included in the scope of rights.

Claims (6)

A housing, a part to be cut that is disposed in the housing and constitutes a part of the electric circuit, a cutting member that cuts the part to be cut, and a power source that is arranged on the first end side of the housing; An electrical circuit breaker comprising:
The cutting part is inserted and accommodated therein, and includes a moving body including the cutting member and a first arc extinguishing space adjacent to the cutting member,
The housing includes a cylindrical portion that can move the movable body between the first end and a second end opposite to the first end,
The moving body is configured such that the cutting member provided in the moving body cuts the cut portion while the moving body is moved from the first end portion toward the second end portion by the power source. Has been
The first arc extinguishing space of the moving body includes a separation piece of the cut portion that is cut and separated when the moving body moves, and a portion of the cut portion that remains in the housing without being separated. An electric circuit breaker configured to be positioned between the main body and the body.
An electric circuit breaker comprising: a housing; a cut portion that is disposed in the housing and forms a part of the electric circuit and that is formed of a fuse; and a power source that is disposed on the first end side of the housing. A device,
The cut portion is inserted and accommodated therein, and includes a moving body including a first arc extinguishing space filled with an arc extinguishing material.
The housing includes a cylindrical portion that can move the movable body between the first end and a second end opposite to the first end,
The moving body is cut by the power source from the first end portion toward the second end portion, while cutting the cut portion accommodated in the first arc extinguishing space of the moving body. Is composed of
The first arc extinguishing space of the moving body includes a separation piece of the cut portion that is cut and separated when the moving body moves, and a portion of the cut portion that remains in the housing without being separated. An electric circuit breaker configured to be positioned between the main body and the body.
The electric circuit breaker according to claim 1, wherein the moving body includes a second arc extinguishing space on a side opposite to the first arc extinguishing space with the cutting member interposed therebetween.
The moving body includes insulating spaces insulated from each other,
4. The structure according to claim 1, wherein when the moving body further moves toward the second end portion, the insulating space is configured to face a main body portion of the cut portion. An electric circuit breaker according to claim 1.
The housing includes a third arc extinguishing space for accommodating an arc extinguishing material outside the cylindrical portion,
5. The electric circuit breaker according to claim 1, wherein the third arc extinguishing space accommodates the main body portion through the inside.
  The electric circuit breaker according to claim 5, wherein a part of the main body portion of the cut portion includes a bent portion bent in the third arc extinguishing space.

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